The most recent game in the Counter-strike series, an original Valve IP and one of the studio’s key multiplayer franchises, is Counter-strike: Source, a remake of the first game rebuilt on the Source engine.

CS:S was first released in 2004 but has seen almost continuous development and support since its addition to the Steam catalogue. It is still considered one of the foremost PC multiplayer shooters.

Valve plays its in-development cards very close to the chest. Its only known project is fellow eSports candidate DOTA 2, soon to be debuted at gamescom next week.